<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="(shop,index) in shopList" :key="shop.skuId">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" v-model="shop.isChecked" @change="updateChecked(shop,$event)">
          </li>
          <li class="cart-list-con2">
            <img :src="shop.imgUrl">
            <div class="item-msg">{{ shop.skuName }}</div>
          </li>
       
          <li class="cart-list-con4">
            <span class="price">{{shop.skuPrice}}.00</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins"
            @click="updateSkunum(shop,-1,'minus')">-</a>
            <input autocomplete="off" type="text" minnum="1" class="itxt" :value="shop.skuNum"
            @input="updateSkunum(shop,$event.target.value * 1,'input')">
            <a href="javascript:void(0)" class="plus"
            @click="updateSkunum(shop,1,'add')">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{shop.skuPrice * shop.skuNum}}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="deleteCart(shop)">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>

      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="isCheckes" @change="updateAllChecked">
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteAllCart">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{shopList.length}}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{totalprice}}</i>
        </div>
        <div class="sumbtn">
          <!-- <a class="sum-btn" href="###" target="_blank">结算</a> -->
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {mapGetters} from 'vuex'
import throttle from 'lodash/throttle'
  export default {
    name: 'ShopCart',
    mounted(){
      this.getShopCartData()
    },
    methods:{
      //获取用户购物车数据
      getShopCartData(){
        //通知VUEX发请求 获取购物车的数据
        this.$store.dispatch('getShopCart')
      },
     updateSkunum:throttle(async function(shop,disNum,flag){
       
        switch(flag){
          case "add":
          //数量变化的值 带给服务器的
          disNum=1
          break;
          case "minus":
            if(shop.skuNum>1){
              disNum=-1
            }else{
              disNum=0
            }
            break;
            case "input":
           //非正常的情况判断 汉字 负数
           if(isNaN(disNum)||disNum<1){
             //用户输入进来的数字不合法 发送给服务器的数字不变
             disNum=0
           } else{
             //用户输入正常  算出差值
             disNum = parseInt(disNum) - shop.skuNum;
           }
           break;  
        }
        //判断修改成功与失败
        try {
           //发请求，通知服务器修改产品的数量 修改产品数量如果成功 再次获取购物车的数据进行展示 展示最新的数据
          await this.$store.dispatch("addShopCart", {
          skuId: shop.skuId,
          skuNum: disNum,
        });

        this.getShopCartData()
        } catch (error) {
          
        }
       
      },500),
      async deleteCart(shop){
       try {
          await this.$store.dispatch('deleteCart',shop.skuId);
          this.getShopCartData();
       } catch (error) {
         alert('删除失败')
       }
      },
     async updateChecked(shop,event){
        let isChecked = event.target.checked?'1':'0'
        try {
         await this.$store.dispatch('updateChecked',{skuId:shop.skuId,isChecked})
         this.getShopCartData()
        } catch (error) {
          
        }
      },
     async updateAllChecked(event){
        let isChecked = event.target.checked?'1':'0'
        try {
       await this.$store.dispatch('updateAllCart',isChecked);
       this.getShopCartData()
        console.log(result)
        } catch (error) {
          
        }
      },
     async deleteAllCart(){
       try {
          await this.$store.dispatch('deleteAllCart');
          this.getShopCartData()
       } catch (error) {
         alert('删除失败')
       }
      } 
    },
    computed:{
      ...mapGetters(['shopCartData']),
      shopList(){
        return this.shopCartData.cartInfoList||[]
      },
      totalprice(){
       let sum=0
       this.shopList.forEach((item)=>{
         sum+=item.skuNum * item.skuPrice
       })
        return sum
      },
      isCheckes(){
        //遍历数组里面的每一个元素（商品）如果每一个商品的ischecked都为1 则计算属性为真 勾上
        //如果商品有一个iscaecked为0 则底下的every返回的结果为false   则 计算属性为false 不勾上
        return this.shopList.every((item)=> item.isChecked==1)&&this.shopList.length >0
      }
    }

  }
</script>

<style lang="less" scoped>
  .cart {
    width: 1200px;
    margin: 0 auto;

    h4 {
      margin: 9px 0;
      font-size: 14px;
      line-height: 21px;
    }

    .cart-main {
      .cart-th {
        background: #f5f5f5;
        border: 1px solid #ddd;
        padding: 10px;
        overflow: hidden;

        &>div {
          float: left;
        }

        .cart-th1 {
          width: 25%;

          input {
            vertical-align: middle;
          }

          span {
            vertical-align: middle;
          }
        }

        .cart-th2 {
          width: 25%;
        }

        .cart-th3,
        .cart-th4,
        .cart-th5,
        .cart-th6 {
          width: 12.5%;

        }
      }

      .cart-body {
        margin: 15px 0;
        border: 1px solid #ddd;

        .cart-list {
          padding: 10px;
          border-bottom: 1px solid #ddd;
          overflow: hidden;

          &>li {
            float: left;
          }

          .cart-list-con1 {
            width: 15%;
          }

          .cart-list-con2 {
            width: 35%;

            img {
              width: 82px;
              height: 82px;
              float: left;
            }

            .item-msg {
              float: left;
              width: 150px;
              margin: 0 10px;
              line-height: 18px;
            }
          }

          // .cart-list-con3 {
          //   width: 10%;

          //   .item-txt {
          //     text-align: center;
          //   }
          // }

          .cart-list-con4 {
            width: 10%;

          }

          .cart-list-con5 {
            width: 17%;

            .mins {
              border: 1px solid #ddd;
              border-right: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }

            input {
              border: 1px solid #ddd;
              width: 40px;
              height: 33px;
              float: left;
              text-align: center;
              font-size: 14px;
            }

            .plus {
              border: 1px solid #ddd;
              border-left: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }
          }

          .cart-list-con6 {
            width: 10%;

            .sum {
              font-size: 16px;
            }
          }

          .cart-list-con7 {
            width: 13%;

            a {
              color: #666;
            }
          }
        }
      }
    }

    .cart-tool {
      overflow: hidden;
      border: 1px solid #ddd;

      .select-all {
        padding: 10px;
        overflow: hidden;
        float: left;

        span {
          vertical-align: middle;
        }

        input {
          vertical-align: middle;
        }
      }

      .option {
        padding: 10px;
        overflow: hidden;
        float: left;

        a {
          float: left;
          padding: 0 10px;
          color: #666;
        }
      }

      .money-box {
        float: right;

        .chosed {
          line-height: 26px;
          float: left;
          padding: 0 10px;
        }

        .sumprice {
          width: 200px;
          line-height: 22px;
          float: left;
          padding: 0 10px;

          .summoney {
            color: #c81623;
            font-size: 16px;
          }
        }

        .sumbtn {
          float: right;

          a {
            display: block;
            position: relative;
            width: 96px;
            height: 52px;
            line-height: 52px;
            color: #fff;
            text-align: center;
            font-size: 18px;
            font-family: "Microsoft YaHei";
            background: #e1251b;
            overflow: hidden;
          }
        }
      }
    }
  }
</style>